객관식
Which of the following is the atomic mass of manganese (Mn)?
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2. Atoms & Elements
Atomic Mass
객관식
Which of the following is closest to the atomic mass of zinc (Zn)?
A
65.39
B
47.87
C
55.85
D
63.55
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검증된 단계별 안내1
Understand that the atomic mass of an element is the weighted average mass of all its naturally occurring isotopes, measured in atomic mass units (amu).
Recall that the atomic number of zinc (Zn) is 30, which identifies the element but does not directly give the atomic mass.
Refer to the periodic table to find the atomic mass of zinc, which is usually listed below the element symbol.
Compare the given options (47.87, 55.85, 63.55) to the known atomic mass of zinc from the periodic table.
Identify the value closest to the known atomic mass of zinc, which is approximately 65.39 amu.
